From 0dca3a843632c2fbb6e358734fb08fc23e800f50 Mon Sep 17 00:00:00 2001 From: jamal Date: Thu, 11 Feb 2010 00:53:13 +0000 Subject: [PATCH] xfrm: Flushing empty SPD generates false events Observed similar behavior on SPD as previouly seen on SAD flushing.. This fixes it. cheers, jamal commit 428b20432dc31bc2e01a94cd451cf5a2c00d2bf4 Author: Jamal Hadi Salim Date: Thu Feb 11 05:49:38 2010 -0500 xfrm: Flushing empty SPD generates false events To see the effect make sure you have an empty SPD. On window1 "ip xfrm mon" and on window2 issue "ip xfrm policy flush" You get prompt back in window1 and you see the flush event on window2. With this fix, you still get prompt on window1 but no event on window2. Signed-off-by: Jamal Hadi Salim Signed-off-by: David S. Miller --- net/key/af_key.c | 2 +- net/xfrm/xfrm_policy.c | 13 ++++++++++--- net/xfrm/xfrm_user.c | 2 +- 3 files changed, 12 insertions(+), 5 deletions(-) diff --git a/net/key/af_key.c b/net/key/af_key.c index 9d47a6aa53dc..8b8e26a9e401 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2713,7 +2713,7 @@ static int pfkey_spdflush(struct sock *sk, struct sk_buff *skb, struct sadb_msg audit_info.secid = 0; err = xfrm_policy_flush(net, XFRM_POLICY_TYPE_MAIN, &audit_info); if (err) - return err; + return 0; c.data.type = XFRM_POLICY_TYPE_MAIN; c.event = XFRM_MSG_FLUSHPOLICY; c.pid = hdr->sadb_msg_pid; diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index 0ecb16a9a883..eb870fcc29cc 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -771,7 +771,8 @@ xfrm_policy_flush_secctx_check(struct net *net, u8 type, struct xfrm_audit *audi int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info) { - int dir, err = 0; + int dir, err = 0, cnt = 0; + struct xfrm_policy *dp; write_lock_bh(&xfrm_policy_lock); @@ -789,8 +790,10 @@ int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info) &net->xfrm.policy_inexact[dir], bydst) { if (pol->type != type) continue; - __xfrm_policy_unlink(pol, dir); + dp = __xfrm_policy_unlink(pol, dir); write_unlock_bh(&xfrm_policy_lock); + if (dp) + cnt++; xfrm_audit_policy_delete(pol, 1, audit_info->loginuid, audit_info->sessionid, @@ -809,8 +812,10 @@ int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info) bydst) { if (pol->type != type) continue; - __xfrm_policy_unlink(pol, dir); + dp = __xfrm_policy_unlink(pol, dir); write_unlock_bh(&xfrm_policy_lock); + if (dp) + cnt++; xfrm_audit_policy_delete(pol, 1, audit_info->loginuid, @@ -824,6 +829,8 @@ int xfrm_policy_flush(struct net *net, u8 type, struct xfrm_audit *audit_info) } } + if (!cnt) + err = -ESRCH; atomic_inc(&flow_cache_genid); out: write_unlock_bh(&xfrm_policy_lock); diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 7c8700447040..b0fb7d3bc15e 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -1677,7 +1677,7 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, audit_info.secid = NETLINK_CB(skb).sid; err = xfrm_policy_flush(net, type, &audit_info); if (err) - return err; + return 0; c.data.type = type; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq;